J. Seto, Y. Ma, S.A. Davis, F. Meldrum, A. Gourrier, Y.-Y. Kim, U. Schilde, M. Sztucki, M. Burghammer, Sergey Maltsev, Christian Jäger, H. Cölfen
- Structuring over many length scales is a design strategy widely used in Nature to create materials with unique functional properties. We here present a comprehensive analysis of an adult sea urchin spine, and in revealing a complex, hierarchical structure, show how Nature fabricates a material which diffracts as a single crystal of calcite and yet fractures as a glassy material. Each spine comprises a highly oriented array of Mg-calcite nanocrystals in which amorphous regions and macromolecules are embedded. It is postulated that this mesocrystalline structure forms via the crystallization of a dense array of amorphous calcium carbonate (ACC) precursor particles. A residual surface layer of ACC and/or macromolecules remains around the nanoparticle units which creates the mesocrystal structure and contributes to the conchoidal fracture behavior. Natures demonstration of how crystallization of an amorphous precursor phase can create a crystalline material with remarkable propertiesStructuring over many length scales is a design strategy widely used in Nature to create materials with unique functional properties. We here present a comprehensive analysis of an adult sea urchin spine, and in revealing a complex, hierarchical structure, show how Nature fabricates a material which diffracts as a single crystal of calcite and yet fractures as a glassy material. Each spine comprises a highly oriented array of Mg-calcite nanocrystals in which amorphous regions and macromolecules are embedded. It is postulated that this mesocrystalline structure forms via the crystallization of a dense array of amorphous calcium carbonate (ACC) precursor particles. A residual surface layer of ACC and/or macromolecules remains around the nanoparticle units which creates the mesocrystal structure and contributes to the conchoidal fracture behavior. Natures demonstration of how crystallization of an amorphous precursor phase can create a crystalline material with remarkable properties therefore provides inspiration for a novel approach to the design and synthesis of synthetic composite materials.…
MetadatenAutor*innen: | J. Seto, Y. Ma, S.A. Davis, F. Meldrum, A. Gourrier, Y.-Y. Kim, U. Schilde, M. Sztucki, M. Burghammer, Sergey Maltsev, Christian Jäger, H. Cölfen |
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Dokumenttyp: | Zeitschriftenartikel |
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Veröffentlichungsform: | Verlagsliteratur |
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Sprache: | Englisch |
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Titel des übergeordneten Werkes (Englisch): | Proceedings of the national academy of sciences of the United States of America : PNAS |
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Jahr der Erstveröffentlichung: | 2012 |
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Verlag: | National Academy of Sciences |
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Verlagsort: | Washington, DC |
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Jahrgang/Band: | 109 |
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Ausgabe/Heft: | 10 |
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Erste Seite: | 3699 |
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Letzte Seite: | 3704 |
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Freie Schlagwörter: | Calcium carbonate biomineralization; Echinoderm skeleton; Hierarchical structuring; Mesocrystal; Skeletal elements |
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DOI: | 10.1073/pnas.1109243109 |
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ISSN: | 0027-8424 |
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ISSN: | 1091-6490 |
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Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
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Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
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Datum der Freischaltung: | 20.02.2016 |
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Referierte Publikation: | Ja |
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Datum der Eintragung als referierte Publikation: | 21.02.2013 |
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